Time for an upgrade

For awhile now I've been wanting to get a nice SLR camera, but didn't really think too much about it, until I went to Arizona a few weeks back and had the chance to use one briefly. I have an upcoming Boston trip in November, and most likely am going to Ireland, Scotland, Wales and England next summer, so I figured now was as good a time as any to upgrade to a nice camera. My little point-and-shoot Casio does alright but is limited. So this past week I bought myself the Nikon D40, and am loving it. I'm still learning how to use it, my last photography class was 10 years ago.